//
//  MainTabBar.swift
//  MyWeibo
//
//  Created by apple on 15/9/30.
//  Copyright © 2015年 LBL. All rights reserved.
//

import UIKit

class MainTabBar: UITabBar {

    
    override func layoutSubviews() {
        super.layoutSubviews()
        
        var index: CGFloat = 0
        let w = UIScreen.mainScreen().bounds.width / 5
        let h = self.bounds.height
        let frame = CGRectMake(0, 0, w, h)
        
        for view in subviews {
            if view is UIControl && !(view is UIButton){
                view.frame = CGRectOffset(frame, index * w, 0)
                //递增
//                if index == 1 {
//                    index++
//                }
//                //递增
//                index++
                index += (index == 1 ? 2 : 1)
            }
        }
        //设置按钮位置
        composeButton.frame = CGRectOffset(frame, 2 * w, 0)
    }

    //懒加载
    lazy var composeButton: UIButton = {
        let btn = UIButton(type: UIButtonType.Custom)
        btn.setBackgroundImage(UIImage(named: "tabbar_compose_button"), forState: UIControlState.Normal)
        btn.setImage(UIImage(named: "tabbar_compose_icon_add"), forState: UIControlState.Normal)
        btn.setBackgroundImage(UIImage(named: "tabbar_compose_button_highlighted"), forState: UIControlState.Highlighted)
        btn.setImage(UIImage(named: "tabbar_compose_icon_add_highlighted"), forState: UIControlState.Highlighted)
        self.addSubview(btn)
        
        return btn
        
        
        
        
        
        
        
    }()
}
